Door-opener.



E. LOVEJOY.

DOOR OPENER.

APPLlCATiON FILED JULY 30,1917- 1,260,561 Patented Mar. 26,1918.

3 SHEETS-SHEET 1- E. LOVEJOY.'

DOOR OPENER.

APPLICATION FILED JULY 30, I917- 1,260,561. Patented Mar. 26, 1918.

SHEET 2.

3 SHEETS E. LOVEJOY.

DOOR OPENER.

APPLICATION FILED JULY 30.1917- 1,260,561. Patented Mar. 26,1918.

3 SHEET$SHEET 3.

UNITED, STAE ENT' 1 ELMER LOVEJTOY, or rename, wyo'mme.

To all whom it may concern: I A

Be it known that I, ELMER Lovnaor, a citizen of the United States, residing at Laramie, county of Albany, and State of Wyoming, have invented a new and useful Door-Opener, of which the-following is a specification. v

The object of my invention is to provide a power operated device for opening doors and gates, which will operate safely and quickly and which is economical in the cost of operation, and which is operated in part by gravity.

It is a further object of my invention to provide a device that will prevent accidents since the door can only be operated when the device has completed its action in either direction.

ll attain these and other objects of my invention by the mechanism illustrated in the accompanying drawings, in which:

' Figure 1 is a side elevation of my invention with the door in raised position; Fig. 2 is a top plan of'a portion of the deviceshowing the disposition of the motor;

Fig. 3 is a side elevation of a ortion of the mechanism fromthereverse s1de of that shown in Fig. 1;

Fig. 1 is a perspective of the apparatus, difierent parts being slightly modified.

Fig. 5 is a detail of member 23.

Like characters designate like parts throughout the several views.

Referring to the accompanying drawings,

1 provide a suitable cable 10 secured to suitable drum 11 which is supported by a suitable axle 26 on frame 24. Cable 10 is secured to the door or gate 19 by any suitable fastening device 25. ll provide a relatively large gear 9 mounted on axle 26 and meshing with pinion 27. Pinion 27 is mounted on axle 28 which also carries gear 8- Gear 8 meshes with pinion 29, which in turn is mounted on axle 30 and driven by motor 7. I provide a brake drum 21 mounted on axle 30. I provide a brake shoe 1, which may be moved into and out of con- To arm 2, near the end is at-' DOOR-(OPENER.

Specification of Letters Patent. Patented Mar, 26, 1918 Application filed. any so, 1917. Serial'No. 183,582.

convenient height, so that when the lower endof the cord is pulled arm 2 will be raised. I provide suitable guide strips 33 attached to frame 24. 4

Arm'2 is normally held in lowered positlon by spring Arm 2 is provided with a slotted end portion 35'shaped to receive and engage latch 4 when arm 2 is raised.

Latch 4c is attached to lever 15 which also operates second latch 16. The upper end of lever 15 is attached to rod 14 which is provided with orificed ends 36, through which bent rod 13 travels. Door 19 is provided with a suitable guide 20 through which a suitable extension 18 of bent rod 13 travels, its path being limited by suitable adjustable collars 12. Bent rod 13 is mounted in a suitable 'guide member 1'? which is attached to frame 24,'as shown in Fig. 1.

I provide a lever 5 pivotally mounted to frame 24 and attached at one end to arm 2 and at the other end by meansof link 37 to a suitable electrical switch 6. The switch 6 is electrically connected by suitable conductors 22 with motor 7.

111 Fig. 1 the door or gate 19 is shown in open or raised position, ready to lower or close. vBypulling cord 3 the arm 2, to which it is attached, is raised and its slotted end 35 is engaged by latch 4, releasing brake-shoe 1 and allowing the door to close against the weight of a properly proportioned counterweight.

When guide 20 comes in contact with the lower collar 12 ,the rod extension 18 is pulled down and pulls with it bent rod 13. The bent rod 13 is lowered and its ofi'set portion passes through the orificed end 35 of rod 14, moves that member forward which causes latch 1 to be withdrawn from its engagement with slotted end 35 of arm 2, thus allowing arm 2 to drop. When arm 2 drops brake 1 is applied to brake drum 21 and the door is stopped through gear 8 and drum 11. At the same time that latch 24 is Withdrawn latch 16 is pushed forward and is in position for the opening of the door.

When it is desired to open or raise door 19 cord 3 is pulled, raising slotted end 35 of arm 2 into engagement with latch 16. This operation releases brake shoe 1, closes the electric switch through lever 5 thereby starting the motor 7 and through theoperation of the train of gears causing cable 10 door.

45 weight. In this-position arm 2, through its ficiently so that guide strikes the upper collar '12, it thereby raises the rod extension 18 and bent rod 13,"until rod 1 1 is operated, causing lever15 to swing back latch 16 from its engagement with slotted end 35' of arm 2. Arm 2 being th us released, drops to its lowermost position which is shown in Fig. 1, and applies brake shoe Ito brake drum 21, at the'same time tilting lever 5 and thus opening the electrical switch 6"which, cuts 31f the current from motor 7 and stops the oor. c To guard against any damage if the door becomesjammed or blocked, gear 8 contains a. suitable friction clutch 23, as illustrated in Figs. 2 and 3, allowing the motor to run ;without damage. 1 g

- While the operation of the device is described as apphedto a door or gate which iselevated and lowered, the invention is adapted to operate equally as well with a door that slides sidewise,

In applying the apparatus to a laterally sliding door, it would simply be necessary to have the'door, hung on the'usua'l form of rail by @rollers or wheels, with the rail slanted slant of the rail;

As shownby the drawing, latches 16 and.

I 4 are attached to theupper and lower extremities respectively, of lever 15. When the door is in .the raised position as shown, the bent rod 13*by sliding throu, h

- the orifice in the end ofrod'l t pulls t e where it is held. Arm 2 through its exupper end of lever 15- back' which pulls back latch 16 and throwsforward latch 4. When cord?) is pulled arm 2 is raised until slotted end engages with latch 4 r tension 31, removes the pressure of the brake block 1 from drum 21 and allows the f door toclose. by gravity against its counter-- connection with lever 5, does not closef the 7 electric switch 6, because its travel is not I so rbd 13 slides through the orifice in-rod 14 far-enough to push rod 14 and the upper end of lever 15 forward which extends latch 16 andfwithdraws latch .51 at the same time a1- .Iowing arm 2 to drop again to the positionto drum 21 and stopping "the door easily and shown in the drawing and applyingbrake 1 without-jar. As mentioned above, latch 41s now withfdrawn and latch 16 pushedforward. When it is now desired to open the door cord 3 1s pulled, raising. arm 2, whichiiow clears latch altogether and engages withlatch 16. In

tion of the motor and application 0 thrown into and out of enga this position it removes the pressure of brake 1 as before, but in this position the travel of arm 2 and leverv 5 is sufficient to close switch 6 which thus starts motor and through connecting gears, drum, and cable, the door is raised until stop 20 reaches upper collar 1 12 and pushes rod 18 and bent rod13 up, rod

invention which is substantially identical other diiference in the modified form is in the arrangement of members 12 and 13 which are in the form of a single longitudinal strip instead of those members being ,arranged substantially parallel with each other, as in Fig. 1, the function is, however, identical. 4

Power from the motor is required only when opening the door, the closing of the door is effected by the counterweights. A

great saving in operating expense. is thus efiected as electrical power is required for onlyone operation of the door; the other operation of its closing being effected by gravity.

The device is accident proofas the-door A can only be operated when it has completed its action in one direction or the other.*

The device inay'be applied to any door or gate which one wishes .What I claim is:

In a power operated combinationof a motor, a brake drum 0 to operate by power.

door opener, 'the eratively connected to themotor, a cab e drum, a train of gears operatively connecting the cable drum and the motor, a cable attached-to the cable drum and to the door to be operated, a brake shoe arranged to be drawn into. and out of engagement with the brake drum, a pivoted arm to which the brake shoe is operatively connected, an electrical motor control electrically connected with the motor and mechanically connected with the pivoted arm to .control the-0 era- 'sion that is attached to one end of the bent the.

etermined times, alon 'tudinally rod, a guide member adapted to be attached to the door and having an operative connection with the rod extension, and adjustable collars mounted on the rod extension to limit the vtravel of that member and thereby control the operation of the bent rod and in attached to the cable drum and having one end secured to the door to be operated, a brake shoe for the brake drum, means for applying the brake shoe to the brake drum, an electric switch controlling the operation of said means, independent adjustable means operatively connected with the door for operating the electric switch, whereby to control the operation of the door.

3. In a device of the class described, the combination of a motor, a train of gears operative-1y connected to the motor, a cable drum operated by the ears, a cable attached at one end to the ca le drum and at the other to the door to be opened, an electric switch to control the operation of the motor,

"a pivoted arm operatively connected with the electric switch, latch members releasably engageable with the pivoted arm, braking means operatively connected with the pivoted arm and arranged to mediately regulate the operation of the train of gears and cable drum, means arranged to operatively connect the latch members with the door, said means including adjustable members for causing the latch members to operate when ,the'door reaches predetermined positions.

4. In a device of'the class described, electrically controlled means for opening the door, a pivoted arm controlling the operation of the aforesaid electrical means, latch members arranged to engage with the pivoted arm to hold it in predetermined positions, means operatively connecting thelatch members with the door, said means including adjustable devices carried by the aforesaid means and positioned to operate the latch members at the desired time, whereby the movement of the door will cause the latch members to operate and release and engage the pivoted arm, at predetermined positions of the door, for the purposes described. I

5. In a device of the class described, electrically controlled means for opening a door having braking means for controlling the door operating means, meansoperatively connected to both the braking means and the electrically controlled means for opening the door, the aforesaid means being operated bythe door at predetermined positions, and operatively connected means for setting the device into operation, said means-including an arm operatively connected to the door and carrying adjustable stops.

6. In a device of the class described, power operated means for opening a door, braking mechanism for controlling the power operated means, a pivoted arm operatively connected with the braking means and with the power operated means, a cable arranged to operate the pivoted arm at will, latch members adapted to engage the pivoted arm to retain it in the desired operating position, rod members operativelyconnected with the latch members and with the door, whereby the latch members will be operated when the door reaches a particular position, and adjustable members on the aforesaid rod members, substantially as and for the purposes described.

ELMER LOVEJOY. 

